Implementation of Gaussian pulse signal source

[AHaumer]

When preparing lectures for this fall, I noticed that an important signal source is missing: Gaussian pulse.

[christiankral]

OK, as I have no actual application of a Gaussian pulse source, so I just want to summarize and clarify its behavior:

• There is the option to create a sequence of pulses using the parameter nperiod
• The pulses are not superimposed. Instead a strictly periodic signal with no overlap of the individual pulses is created.
• So the behavior is different from creating a vector of single pulse sources with consecutive startTime and adding their outputs.

@AHaumer I suppose this behavior is intended, isn't it?